Toro 30"(29521) Stand-On AeratorDescription The 76. 2 cm stand on model boasts a powerful Kawasaki V Twin engine with integrated hydraulics that follow the contours of the ground to pull even plugs over hills and soft ground. It applies up to 544. 3 kg of down pressure on the tines to pull up to 12. 7 cm cores, and operators can finely tune the hydraulic system to pull any length of plug on the fly. Electronic foot pedal controls also allow the operator to raise and lower the tines